Jerry Roberts Posted March 9, 2008 Report Posted March 9, 2008 Others have said that the Champion spark plugs are no good , now I have joined that club too . I put in a set of Champion 592 (rj12) and the engine didn't run well . I switched to Autolite 306 and all was smooth . Quote
Normspeed Posted March 10, 2008 Report Posted March 10, 2008 I agree, I've had good luck with the Autolite 306 plugs. Quote
cole18cars Posted March 13, 2008 Report Posted March 13, 2008 I have Autolite 85's in my 39 plymouth 201. I have installed a dual carb setup and the plugs are getting a little fouled. Any idea for a different Autolite plug? Thanks Quote
Lou Earle Posted March 13, 2008 Report Posted March 13, 2008 I would re set the timing a bit before I got new plugs- timing off a bit will often cause fouling Lou Quote
greg g Posted March 13, 2008 Report Posted March 13, 2008 A lot of folks say to crank in a bit more advance at idle to compensate for todays slower burning fuels. The advance anticipates TDC and fires off a bit sooner to allow the flame travel to push on the piston longer. Quote
james curl Posted March 13, 2008 Report Posted March 13, 2008 I used 10 degrees initial on my 48 P 15, with the vacuum and mechanical advance you can end up with almost 50 degrees before TDC at 3000 RPM. That is too much advance and will beat the piston pin bushing in the top of the rod up a bit. This causes a clicking sound like a loose tappet. Can also cause broken top rings. I think 3 degrees before TDC would be adequate. Quote
Don Coatney Posted March 13, 2008 Report Posted March 13, 2008 I have Autolite 85's in my 39 plymouth 201. I have installed a dual carb setup and the plugs are getting a little fouled. Any idea for a different Autolite plug? Thanks Your plugs should be fine. Double up on your air cleaners. This fixed my plug fouling problem. Quote
Andydodge Posted March 13, 2008 Report Posted March 13, 2008 Don, is that firewall mounted tank shown in the pic a vaccum tank?, are you running a large cam or what was the reason for it, thanks, andyd Quote
greg g Posted March 13, 2008 Report Posted March 13, 2008 The vacuum can is plumbed into the vacuum line to the windshield wiper motor. It provides enough stored vacuum to provide for wipers while climbing a hill or accelerating. I have one up under my dash and I get about 6 to 8 swipes out of it which is generally enough to make the difference. You can find them in GM cars complete with check valve. I believe they used them for heater door controlls and such. They look like a pizza sauce can with some rubber lines running to it. Quote
cole18cars Posted March 13, 2008 Report Posted March 13, 2008 Hey Don, Exactly what does the extra air filter do? More surface area? Thanks Quote
Don Coatney Posted March 14, 2008 Report Posted March 14, 2008 Hey Don, Exactly what does the extra air filter do? More surface area? Thanks It allows more unrestricted air to enter the carburetors for better engine breathing. Quote
Don Coatney Posted March 14, 2008 Report Posted March 14, 2008 Don, is that firewall mounted tank shown in the pic a vaccum tank?, are you running a large cam or what was the reason for it, thanks, andyd As Greg has already stated the vacuum can is used for extra umooph for the wipers. I can get 4-5 swipes after the engine has been shut down for a couple of minutes. With dual carburetors and a "hot" cam my normal engine vacuum is lower than a stock engine. This vacuum can stores vacuum at the higest level the engine can produce so the wipers work much better. Quote
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